Unused open box...1/2 off retail! Features & details [1DD+1BA]: 12 mm big Titanium Composite Diaphragm combined with 1 extreme high-frequency balanced driver, It delivers a power deep bass and clear treble,bring you a new hearing feast. [Metal Texture]: Patented design, aviation aluminum alloy Texture comes from the combination of audio technology and fashion. [Ergonomic & Compatible Model ]: Ergonomic design can fit most people ears and make you feel comfortable.The cable use 0.78mm 2pins 3.5mm plug detachable upgraded cables.Suitable for most Android smartphones. [Keep it safe]: Because of designing a High-precision structure, please prevent external impact, severely slammed may result in loss of sound quality.